Which of the following statements are true/false?
I. Cell aggregate body plan is found in phylum-Platyhelminthes.
II. Radial symmetry is the most common symmetry found in animals.
III. Pseudocoelom is only found in phylum-Aschelminthes.
IV. All triploblastic animals have a true coelom.
V. Haemocoel is sometimes pbserved in animals belonging to phylum-Platyhelminthes.
Important Questions on Human Reproduction
Match the following and choose correct combination.
| Column I | Column II | ||
| i) | Cellular grade level | a) | Pheretima |
| ii) | Tissue grade level | b) | Schistosoma |
| iii) | Organ level | c) | Obelia |
| iv) | Organ system level | d) | Sycon |
Consider following features:
- Organ system level of organisation
- Bilateral symmetry
- True coelomates with segmentation of body.
Select the correct option of animal group which possess all the above characteristics:
Match the following
| List - I | List - II | ||
| (a) | Asymmetry | (i) | Cnidaria |
| (b) | Radial symmetry | (ii) | Platyhelminthes |
| (c) | Bilateral symmetry and Enterocoelom | (iii) | Porifera |
| (d) | Bilateral symmetry without body cavity | (iv) | Hemichordata |
The correct answer is
Which of the following phyla possess body cavity as shown in the diagram below?
Match the months listed in Column - I write the organogenesis of foetus in Column - II.
| Column - I | Column - II | ||
| (i) | First month | (a) | Separation of eye lids |
| (ii) | Second month | (b) | Hairs on head |
| (iii) | Fifth month | (c) | Heart |
| (iv) | Six month | (d) | limbs and Digits |
| Column-I | Column-II | ||
| P | Mollusca | i | Pseudocoelom |
| Q | Annelida | ii | Radula |
| R | Nematoda | iii | Radial symmetry |
| S | Echinodermata | iv | Segmentation |
Choose the CORRECT combination.
Match the following.
| Sub Division | Character | Example | |||
| Acoelomata | Coelom is formed by archenteron | Mollusca | |||
| Pseudocoelomata | Without a body cavity | Hemichordata | |||
| Schizocoelomata | Body cavity should not lined by mesodermal layers | Nematoda | |||
| Enterocoelomate | Coelom is formed by splitting of mesoderm | Platyhelminthes | |||
